add defaultResult and customAction support to artefacts. (issue #14) clean up a couple of functions in creature. Aggressive player acts now decrease affinity to all other local creatures. (issue #174)
Erode affinity back to "original" level over time when it's negative, not just positive.
Fix a bug in "destroy" when only weapon carried is breakable.  Fix missing brackets in reduceLocalFriendlyCreatureAffinity
allow random exit to be returned even if there's only one. (makes flee work more often - can't use dead-ends)
partially undo last change - make flee work 1 in 3 times when backed into a corner.
ensure player knows creature has fled even after first attempt (side effect of allowing multiple attempts based on fear and random chance when in a dead-end location)